What is the definition of n-dubz?

N-Dubz is a British hip hop, grime and R&B trio from Camden Town, London. The group formed in 2000; consists of cousin Dappy (vocals) along with Tula Contostavlos (vocals) and Richard "Fazer" Rawson (vocals/rap). In their younger teenage years the trio would MC at various sets around Camden, often at local youth clubs and community gatherings.